A block of mass m = 2.2 kg rests on a horizontal frictionless surface. The block is launched up a 40.00 incline by releasing a compressed spring, which initially has a spring potential energy of 338 J. The surface of the incline has a coefficient of kinetic friction of 0.280. It is observed that the block travels up the incline a distance d, before coming momentarily to rest and then sliding back down. (See figure below.) Use work & energy principles to answer the following questions. Assume g = 9.80 m/s^2. How far up the incline, d, (in meters) does the block travel? Enter your answer to one decimal place without units in the space below. If a block of mass M = 6.4 kg was launched a distance d = 25.2 m up the incline described in part a) of this problem, where it comes to rest momentarily, what would be the speed of this block (in meters/second) when it has slid back down to the bottom of the incline? Enter your answer to one decimal place without units in the space below.

k a / = 0.280 m HK = 0 40.0